Method of making a plurality of like tubular objects



T. E. MURRAY. METHOD Ol MAKING A PLURALITY Q'F LIKE TUBULAR OBJECTS.

APPLICATION FILED JAN-15, 19I9. 4

Patented Aug. 24, 1920.

51% 0 @MQM THOMAS E. MURRAY, OF NEW .YORK, N. Y.

METHOD OF MAKING A PLURALITY 0F LIKE TUBULAR OBJECTS.

Specification or Letters Patent.

Patented Aug. 24, 19202 Application filed January 15, 1919. Serial No. 271,326. 7

To all whom it may concern.-

Be it known that I, 'IIIOMAS E. MURRAY, a citizen of the-Un'itedStates, residing at New York, in the county of New York and State of New York, have invented a certain new and useful Improvement in Methods of Making a Plurality of like Tubular Objects, of which the following is a speclfication.

The invention is a method of-producing a plurality of tubular objects of sheet metal and of predetermined configurat1oneach of said objects .being formed of two longitudinal half sections, and all of the sections forming the said objects being united simultaneously by continuous joints produced by a single electrical welding operation. The

object is to cheapen and simplify the manufacture. i

In the 1 accompanying drawings I illustrate my method as applied to, the manufacture of the tubular shells of vehicle hubs. Figure 1 is a'perspective view of two of said hubs before separation. Fig. 2 is a similar view of six of said hubs, also before separation. v

Similar letters of reference indicate like parts. I

the cylindrical portion A, the cylindrical portion B of largerdiameter than portion A and the intermediate tapered portion C unitingsaid cylindrical portions. To produce two such unit shells, Imake by stamping or striking up the sheet metal, two precisely similar longitudinal half sections, each having a semi cylindrical portion D of twice the desired width ofteach cylindrical ortion A, aiid semi-cylindrical portions 1% B and A, A united by'taperedportions C, C. These sections I tact at their edges, as shown in Fig. 1, and

I electrically weld said edge surfaces together In Fig. 1 each hub shell unit consists of at a single welding operation. I then divide the cylindrical portionsA, A by a transverse cut, as vindicated'by dotted line a in Fig. l-thus separating the two precisely similar units.

Where more than two hub shells are to be made, two longitudinal half sections are.

produced as before, but alternating with the semi-cylindrical 1 portions D are the semicylindrical port/ions E of greater diameter than portions D''each portion E being of twice the width of the semi-cylindrical portion B. These two sections being placed in registering contact at their edges, as shown in Fig. 2, said edge surfaces are electrically welded together at a single welding operation. I then divide the cylindrical portions A, A by transverse cuts, as indicated by the dotted line a, a, a, Fig. 2, and the cylindrical portions lines 6, b, and Ithus produce six hub shell units all precisely alike.

claim: The method of making a plurality of like tubularobjects, each having atone end a cylinder and at the opposite end a cy1in'- B, B, as indicated by dotted section of a structurally integral series of said objects having like semi-cylindrical ends united, electrically welding two ofsaid place in registering con! half sections together at their registering edges, and transversely dividing said united semi-cylindrical ends 'toseparatcthe units of said series. Y

In testimony whereof I have aflixed my signature in presence of two witnesses.

THOMAS E. MURRAY.

Witnesses:

' GERTRUDE T. iPoR'rE'B,

MAY T. MGGARRY. 

